Brake-shoe.



w. F, CARLSON.

BRAKE SHOE.

APPLICATION FILED MAR. 30. 1918.

Patented Sept. 17, 1918.

Wilt mam m: mmms BRAKE-SHOE.

Specification of Letters Patent."

Patented Sept. 17, 1918.

Application filed March 30, 1918. Serial No. 225,829.

To all whom'z't may concern Be it known that I, WILLIAM FRANCIS CARLSON, a citizen of the United States, residing at Merrick, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Brake-Shoes, of which the following is a specification.

This invention relates to a brake, primarily adapted for use on railway rolling stock, and which may be used as an ordinary or an emergency brake, the object of the invention being to produce a shoe, supported in a novel manner whereby the same may be readily adjusted and which, when brought to braking position will engage both the rail and the periphery of the wheel.

With the above and other objects in view, the improvement resides in the construction, combination and arrangement of parts set forth in the following specification and fall.- ing within the scope of the appended claims.

In the drawing:

Figure 1 is a detail elevation of a portion of a rolling stock provided with the improvement,

Fig. 2 is a similar view showing the shoe in braking position, and

Fig. 3 is a perspective view of the shoe.

'In the drawing, the numeral 1 designates a vehicle ofany desired type, such as a trolley or railroad car.

The wheels of the car are indicated by the numeral 2, and the track on which the wheels travel by the numeral 3, while the numeral 4 designates the truck frame on which the axle 5 for the wheels 2 is journaled.

The brake shoe is indicated by the numeral 6, and is in the nature of a block or casting, having one of its faces concaved, as at 7, to engage with the periphery of the wheel 2, the said concaved face having one of its edges provided with a flange 8 that is designed to contact with one of the sides or faces of wheel 2, when theshoe is brought to braking position.

The bottom face 9 of the shoe is flat but is provided, on one of its edges with a downturned flange 10, arranged on the edge of the shoe provided with a curved flange 8. If desired, and as illustrated by the drawings, the rail-engaging face 9 may be rough- V ened or serrated to more effectively grip the rail. 7

The rear face of the shoe is straight, and

is approximately centrally formed with spaced outstanding ears 11 between which is pivotally secured, as at 12, a lever 13 that supports the shoe in both its inactive and active positions. The lever 13 may be operated in any desired or preferred manner, the operating means therefor normally holding the same in one position to elevate the shoe above the track and bring the same out of wheel-engaging position.

In the course of construction I have found that thecurved wheel-engaging face 7 of the shoe does not exactly conform to the periphery of the wheel, and also that when the shoe is in usethe wear imparted by the wheel necessitates adjustment of the shoe with respect to the wheel. Therefore, on the rear face of the shoe above the ears 11 I form the same with an outwardly extending, preferably upwardly disposed lug 14 which is bifurcated from the outer end thereof, and the arms provided by the said bifurcation are provided with a plurality of spaced alining operations 15, and through certain of these openings is passed a pin 16 that also passes through the lever 13. The

lever 13 is provided with an elongated slot or with a plurality of spaced openings for the reception of the pin 16. By this arrangement a proper adjustment of the shoe with respect to the wheel may be easily and quickly obtained, and also by this arrangement no auxiliary means need be provided 7 for holding the shoe on the frame of the truck, the same engaging the lever at two points will be sustained thereon without necessitating auxiliary suspending means.

From the above description, taken in con nection with the accompanying drawing, the simplicity and advantages of the construction will, it is thought, be apparent to those skilled in the art without further detailed description. 7

What I claim is:

1. In a braking means for the wheel of a rolling stock, the combination with the roll ing stock and a rail on which the wheels of the same travel, a lever connected with the rolling stock to the rear of one of the wheels, and operating means for said lever, a shoe comprising a block having a lower straight face which is roughened and which is normally disposed above the track, said shoe having an, arcuate face disposed opposite the wheel of the rolling stock, ears on the rear face of the shoe to which the face of the shoe, a lug above the ears, bifurcated from the outer end thereof, the arnis provided by the bifurcated lug having spaced openings, a lever pivotally secured between the ears and adjustably connected between the arms ofthe lugs.

In testimony whereof I aflix my signature.

WILLIAM FRANCIS CARLSON.

lever is pivotally connected, a lug disposed upward of the ears and also pivotally connected to the lever.

2. In a device for the purpose set forth, a shoe comprising a block having a straight engaging face and a curved engaging face and having flanges on one of the sidesof both of said faces, spaced ears on the rear Copies of this patent may be obtained. forfive cents each, by addressingtne Commissioner oi latent;

Washington, D, 0.. 

